Final answer:
To find the midpoint on a vertical line, keep the x-coordinate and average the y-coordinates. For a horizontal line, keep the y-coordinate and average the x-coordinates.
Step-by-step explanation:
When finding the midpoint between two points on a vertical line, keep the x-coordinate and find the average of the y-coordinates.
When finding the midpoint between two points on a horizontal line, keep the y-coordinate and find the average of the x-coordinates.
Learn more about Finding the midpoint between two points on horizontal or vertical lines